Congratulations are in order for Prince William and Kate Middleton — they are new parents-of-three! The 36-year-old Duchess of Cambridge gave birth to a baby boy on Monday, April 23, Kensington Palace confirmed in an official statement.

"Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 1101hrs. The baby weighs 8lbs 7oz. The Duke of Cambridge was present for the birth. Her Royal Highness and her child are both doing well," the statement read. "The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall, Prince Harry, and members of both families have been informed and are delighted with the news." The baby's name has not been released at this time.

Kate during her third pregnancy.

The royal family further confirmed the news by displaying a notice on the forecourt of Buckingham Palace. "It is tradition that a framed notice of birth goes on display on a ceremonial easel on the forecourt at the Palace," a tweet with photos of the easel as well as onlookers taking photos from outside Kensington Palace. "The notice will be on display for approximately 24 hours. When it is taken down, it is sent to the Privy Council Office so that the details of may be recorded in the Privy Council records," read another one. So exciting!

It is tradition that a framed notice of birth goes on display on a ceremonial easel on the forecourt at the Palace. pic.twitter.com/xd1XgBV9Ux

The new royal baby joins Kate and William's two older children, Prince George, 4, and Princess Charlotte, 2. According to a previous report from Life & Style, George and Charlotte were so excited to welcome a little sibling into their family during their mom's pregnancy. "They rub their mum’s tummy and talk to the new baby. George and Charlotte really are both lovely, normal kids," a family friend told the magazine.

Kate and William announced they were expecting their third child in early September 2017. "Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their third child. The Queen and members of both families are delighted with the news," a statement released by Kensington Palace read at the time.

The arrival of Kate and William's third baby comes just a few short weeks before Prince Harry is set to tie the knot with his American fiancée, Meghan Markle, at Windsor Castle on Saturday, May 19. According to a recent report, Harry and Meghan are eager to give George, Charlotte, and the new baby some royal cousins shortly after they tie the knot.

Royal expert Katie Nicholl recently said, "My sources are saying that Prince Harry, particularly, is very keen to start a family pretty soon after the royal wedding. He's made no secret about wanting children." We can't wait for more royal babies to join the family — congrats again to Kate and William on their new addition, we can't wait to meet him!